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<a name="Files-opened-without-an-explicit-ACTION_003d-specifier"></a>
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<a name="Files-opened-without-an-explicit-ACTION_003d-specifier-1"></a>
<h3 class="section">4.7 Files opened without an explicit ACTION= specifier</h3>
<a name="index-open_002c-action"></a>

<p>The Fortran standard says that if an <code>OPEN</code> statement is executed
without an explicit <code>ACTION=</code> specifier, the default value is
processor dependent.  GNU Fortran behaves as follows:
</p>
<ol>
<li> Attempt to open the file with <code>ACTION='READWRITE'</code>
</li><li> If that fails, try to open with <code>ACTION='READ'</code>
</li><li> If that fails, try to open with <code>ACTION='WRITE'</code>
</li><li> If that fails, generate an error
</li></ol>





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